A water-cooled furnace bottom of a submerged arc furnace

Abstract

The present invention provides a water-cooled furnace bottom of an ore-heating furnace, including a furnace body, characterized in that the furnace bottom is formed by splicing a plurality of conductive copper tiles with cooling channels therein in sequence to form a conductive furnace bottom, one end of the cooling channel on each conductive copper tile is a water inlet and the other end is a water outlet, the water inlet is connected to a tower-type flow-equalizing water distributor through a water inlet pipe, and the water outlet is connected to a water outlet pipe. The arc furnace bottom of the ore-heating furnace is formed by a plurality of conductive copper tiles with cooling channels therein, that is, water is used as a cooling medium to effectively water-cool the conductive copper tiles of the furnace bottom, and then the tower-type flow-equalizing water distributor is used to uniformly deliver cooling water with a consistent flow rate and pressure to each conductive copper tile, thereby greatly improving the cooling effect while maximally saving water resources, and the cooling water after absorbing heat can be used for other purposes to fully utilize the heat energy, and the water after cooling can be returned to facilitate recycling, greatly reducing the cooling cost, and being more green and environmentally friendly.

Description

Technical Field

[0001] The invention relates to a furnace bottom of an ore-heating furnace, in particular to a water-cooled furnace bottom of an ore-heating furnace, and belongs to the technical field of design and manufacture of furnace bottoms of ore-heating furnaces. Background Art

[0002] At present, the furnace bottoms of ore-fired furnaces mainly include conductive furnace bottoms, multi-contact pin type and steel column type furnace bottoms. The electrodes of this type of furnace bottoms are not only complex in structure, but also have a large cooling area for the furnace bottom electrodes, resulting in a large cooling temperature difference during use, which can easily cause internal arc deviation and uneven heating of the raw materials. The existing technology mostly uses air cooling to cool the furnace bottom. Although the air cooling method has a relatively simple structure, the cooling effect is poor. At the same time, air cooling has a high space requirement and requires sufficient space to install large air cooling equipment. Ordinary small factories are difficult to meet the requirements. In addition, the air cooling method cannot recycle waste heat, resulting in energy waste. Therefore, it is necessary to improve the existing technology. Summary of the invention

[0003] In order to solve the problems that the existing furnace bottom electrodes of the submerged arc furnace adopt air cooling, resulting in poor cooling effect and inability to recover waste heat, the present invention provides a water-cooled furnace bottom of the submerged arc furnace.

[0004] The present invention is completed through the following technical scheme: a water-cooled furnace bottom of an electric arc furnace, including a furnace body, characterized in that the bottom of the furnace body is composed of a plurality of conductive copper tiles with cooling channels therein, which are sequentially spliced ​​into a conductive furnace bottom, one end of the cooling channel on each conductive copper tile is a water inlet, and the other end is a water outlet, the water inlet is connected to a tower-type equal flow water distributor through an inlet pipe, and the water outlet is connected to the outlet pipe, so that a conductive furnace bottom is formed by conductive copper tiles, and cooling water is directly used in the copper tiles for cooling, thereby improving the cooling effect and facilitating the recovery of waste heat brought out by the water.

[0005] The water outlet pipe is connected to a cooler or to a device that needs to use hot water.

[0006] The conductive copper tile includes a central conductive copper tile located at the center, a first conductive copper tile group surrounding the central conductive copper tile and in a ring shape, and a second conductive copper tile group surrounding the first conductive copper tile group and in a ring shape; two groups of central serpentine cooling channels are symmetrically arranged in the central conductive copper tile, one end of each group of central serpentine cooling channels is connected to a central water inlet pipe extending downward, and the other end is connected to a central water outlet pipe extending downward; the first conductive copper tile group includes a plurality of first fan-shaped conductive copper tiles equally divided along its ring shape, each of which is provided with a first serpentine cooling channel, one end of the first serpentine cooling channel is connected to the first water inlet pipe extending downward, and the other end is connected to the first water outlet pipe extending downward; the second conductive copper tile group includes a plurality of second fan-shaped conductive copper tiles equally divided along its ring shape, each of which is provided with a second serpentine cooling channel, one end of the second serpentine cooling channel is connected to a second water inlet pipe extending downward, and the other end is connected to a second water outlet pipe extending downward.

[0007] The central conductive copper tile is configured as a circular conductive copper tile, the first conductive copper tile group is configured as four sector-shaped conductive copper tiles connected to each other, and the second conductive copper tile is configured as sixteen sector-shaped conductive copper tiles connected to each other.

[0008] The central conductive copper tile is provided with a central connecting hole for connecting a thermocouple.

[0009] The first sector-shaped conductive copper tile is provided with a first connecting hole for connecting a thermocouple.

[0010] The second sector-shaped conductive copper tile is provided with a second connection hole for connecting a thermocouple.

[0011] The diameter of the central serpentine cooling channel is 42 mm.

[0012] The diameter of the first serpentine cooling channel is 60 mm.

[0013] The diameter of the second serpentine cooling channel is 60 mm.

[0014] The tower-type equalizing flow water distributor comprises a water supply main composed of a vertical upper thin tube and a lower thick tube. The upper thin tube and the lower thick tube are respectively connected to the inner sides of the upper and lower annular tubes through corresponding upper and lower horizontal connecting tubes. The outer sides of the upper and lower annular tubes are respectively connected to a plurality of corresponding upper water inlet branches and a plurality of lower water inlet branches which are arranged at intervals. The plurality of upper water inlet branches are respectively connected to the corresponding first fan-shaped conductive copper tile water inlet pipes, and the plurality of lower water inlet branches are respectively connected to the corresponding second fan-shaped conductive copper tile water inlet pipes. Two top water inlet branches are arranged on the top of the upper thin tube. The top water inlet branches are connected to the central conductive copper tile water inlet pipe, so that when cooling water enters the upper thin tube from the lower thick tube to supply water, the water flow is evenly distributed to the upper and lower water inlet branches, and the cooling water flow is adjusted by a throttling orifice.

[0015] The bottom end of the lower thick tube of the water supply main pipe is the water inlet end, and the top end of the upper thin tube is the closed end. The lower thick tube and the upper thin tube are connected through a tapered tube with a small top and a large bottom to evenly distribute cooling water.

[0016] The diameters of the upper horizontal connecting pipe and the upper annular pipe are smaller than the diameters of the lower horizontal connecting pipe and the lower annular pipe, so as to evenly distribute the cooling water while ensuring the consistency of the cooling water pressure and flow.

[0017] The diameters of the upper and lower water inlet branches are the same, and the number of elbows and the bending angles of each water inlet branch are the same, so that the flow rate and pressure of cooling water entering the cavity of the conductive copper tile remain consistent.

[0018] The upper and lower water inlet branches are provided with throttling orifice plates, which include two flanges provided on the water inlet branch and an orifice plate provided between the two flanges and having a plurality of through holes thereon. The number, shape and size of through holes in each throttling orifice plate are the same, so that the flow rate and flow velocity of the cooling water flowing through can be controlled through the through holes, so that the flow rate and flow velocity of the cooling water flowing through each water inlet branch are consistent.

[0019] The upper annular tube and the lower annular tube are provided with pressure gauges for detecting water pressure.

[0020] The present invention has the following advantages and effects: by adopting the above scheme, the arc furnace bottom of the submerged arc furnace formed by several conductive copper tiles with cooling channels therein can be conveniently connected with the conductive copper tile cooling channel through the water supply pipe, that is, water is used as the cooling medium to effectively water-cool the conductive copper tiles of the furnace bottom, and then the tower-type flow-equalizing water distributor is used to evenly deliver cooling water with a consistent flow rate and pressure to each conductive copper tile, which greatly improves the cooling effect while saving water resources to the maximum extent. The cooling water after absorbing heat can be used for other purposes, making full use of the heat energy, and the water after cooling can be returned to facilitate recycling, greatly reducing the cooling cost, and being more green and environmentally friendly. It is indeed an ideal water-cooled furnace bottom cooling of the submerged arc furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the present invention;

[0022] Figure 2 for Figure 1 A top view of the

[0023] Figure 3 for Figure 2 Schematic diagram of the central conductive copper tile structure, in which the single dotted line represents the central serpentine cooling channel;

[0024] Figure 4 for Figure 2 A schematic diagram of the first fan-shaped conductive copper tile structure in FIG. 1 , wherein the single dotted line in the figure represents the first serpentine cooling channel;

[0025] Figure 5 for Figure 2 A schematic diagram of the structure of the second fan-shaped conductive tile in FIG. 1 , wherein the single dotted line in the figure represents the second serpentine cooling channel;

[0026] Figure 6 for Figure 1 Schematic diagram of the tower type equal flow water distributor structure. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] The water-cooled furnace bottom of the ore-fired furnace provided by the present invention comprises a furnace body, the bottom of the furnace body is formed by sequentially splicing a plurality of conductive copper tiles with cooling channels therein into an arc-shaped bottom, the cooling channel on each conductive copper tile is provided with a water inlet and a water outlet, the water inlet is connected to a tower-type equalizing water distributor through a water inlet pipe, and the water outlet is connected to a water outlet pipe, so that a conductive furnace bottom is formed through the conductive copper tiles, and cooling water is directly transported into the copper tile cooling channel for cooling, thereby improving the cooling effect;

[0029] The conductive copper tile comprises a central conductive copper tile 1 located at the center, a first conductive copper tile group 2 in a ring shape surrounding the central conductive copper tile 1, and a second conductive copper tile group 3 in a ring shape surrounding the first conductive copper tile group 2; two groups of central serpentine cooling channels 11 are symmetrically arranged in the central conductive copper tile 1, one end of each group of central serpentine cooling channels 11 is connected to a central water inlet pipe 12 extending downward, and the other end is connected to a central water outlet pipe 13 extending downward; the first conductive copper tile group 2 comprises four first fan-shaped conductive copper tiles 21 equally divided along its ring shape, each of which is provided with a first serpentine cooling channel 22, one end of the first serpentine cooling channel 22 is connected to a first water inlet pipe 23 extending downward, and the other end is connected to a first water outlet pipe 24 extending downward; the second conductive copper tile group 3 comprises sixteen second fan-shaped conductive copper tiles 31 equally divided along its ring shape, each of which is provided with a second serpentine cooling channel 32, one end of the second serpentine cooling channel 32 is connected to a second water inlet pipe 33 extending downward, and the other end is connected to a first water outlet pipe 24 extending downward. One end is connected to a second water outlet pipe 34 extending downward; the central conductive copper tile 1 is set as a circular conductive copper tile, the first conductive copper tile group 2 is set as four first fan-shaped conductive copper tiles 21 connected to each other, and the second conductive copper tile group is set as sixteen second fan-shaped conductive copper tiles 31 connected to each other; the central conductive copper tile 1 is provided with a central connecting hole 14 for connecting a thermocouple; the first fan-shaped conductive copper tile 21 is provided with a first connecting hole 25 for connecting a thermocouple; the second fan-shaped conductive copper tile 31 is provided with a second connecting hole 35 for connecting a thermocouple; the diameter of the central serpentine cooling channel 11 is 42mm; the diameter of the first serpentine cooling channel 22 is 60mm; the diameter of the second serpentine cooling channel 32 is 60mm; the central water outlet pipe 13, the first water outlet pipe 24, and the second water outlet pipe 34 are connected to a conventional cooler (not shown in the figure) to cool the cooling water after absorbing heat and then return it for use, or are connected to equipment that needs to use hot water to make full use of the thermal energy of hot water, and then return the water for use to realize water circulation;

[0030] The tower-type equalizing water distributor 4 includes: a water supply main composed of a vertical upper thin tube 43 and a lower thick tube 41, the upper thin tube 43 and the lower thick tube 41 are respectively connected to the inner sides of the upper and lower annular tubes 45 and 48 through corresponding upper and lower horizontal connecting tubes 44 and 49, the outer side of the upper annular tube 45 is connected to the corresponding four upper water inlet branches 46 arranged at intervals, the four upper water inlet branches 46 are respectively connected to the first water inlet pipes 23 of the first serpentine cooling channels 22 of the corresponding four first fan-shaped conductive copper tiles 21, and the outer side of the lower annular tube 48 is connected to the corresponding four upper water inlet branches 46 arranged at intervals. The sixteen lower water inlet branches 47 are connected, and the sixteen lower water inlet branches 47 are respectively connected to the second water inlet pipes 33 of the second serpentine cooling channels 32 of the corresponding sixteen second fan-shaped conductive copper tiles 31. Two top water inlet branches 431 are provided on the top of the upper capillary tube 43, and the top water inlet branches 431 are respectively connected to the central water inlet pipes 12 of the two central serpentine cooling channels 11, so that the cooling water enters from the lower thick tube 41 and flows to the upper capillary tube 43 to supply water, and the water flow is evenly distributed to the upper and lower water inlet branches 46 and 47, and then passes through the throttling orifice plate 5. Regulate the cooling water flow; the bottom end of the lower thick tube 41 of the water supply main is the water inlet end, and the top end of the upper thin tube 43 is the closed end. The lower thick tube 41 and the upper thin tube 43 are connected by a tapered tube 42 with a small top and a large bottom, so as to evenly distribute the cooling water; the diameters of the upper horizontal connecting tube 44 and the upper annular tube 45 are smaller than the diameters of the lower horizontal connecting tube 49 and the lower annular tube 48, so as to evenly distribute the cooling water while ensuring the consistency of the cooling water pressure and flow; the diameters of the upper and lower water inlet branches 46 and 47 are the same, and the number and The bending angles are all the same so that the cooling water flow and pressure entering the conductive copper tile cavity remain consistent; the throttling orifice plate 5 includes two flanges arranged on the water inlet branch pipe, and a orifice plate with a plurality of through holes arranged between the two flanges, and the number, shape and size of the through holes of each throttling orifice plate are the same, so that the cooling water flow and flow rate flowing through can be controlled through the through holes, so that the cooling water flow and flow rate flowing through each water inlet branch pipe are consistent; the upper annular tube 45 and the lower annular tube 48 are provided with pressure gauges (not shown in the figure) for detecting water pressure.

Claims

1. A water-cooled furnace bottom of a submerged arc furnace, comprising a furnace body, characterized in that The bottom of the furnace body is composed of a plurality of conductive copper tiles with cooling channels therein, which are sequentially spliced ​​into a conductive furnace bottom. One end of the cooling channel on each conductive copper tile is a water inlet and the other end is a water outlet. The water inlet is connected to the tower-type equal flow water distributor through the water inlet pipe, and the water outlet is connected to the water outlet pipe. The conductive copper tile comprises a central conductive copper tile located at the center, a first conductive copper tile group surrounding the central conductive copper tile and in a ring shape, and a second conductive copper tile group surrounding the first conductive copper tile group and in a ring shape; two groups of central serpentine cooling channels are symmetrically arranged in the central conductive copper tile, one end of each group of central serpentine cooling channels is connected to a central water inlet pipe extending downward, and the other end is connected to a central water outlet pipe extending downward; the first conductive copper tile group comprises a plurality of first fan-shaped conductive copper tiles equally divided along its ring shape, each of which is provided with a first serpentine cooling channel, one end of the first serpentine cooling channel is connected to a first water inlet pipe extending downward, and the other end is connected to a first water outlet pipe extending downward; the second conductive copper tile group comprises a plurality of second fan-shaped conductive copper tiles equally divided along its ring shape, each of which is provided with a second serpentine cooling channel, one end of the second serpentine cooling channel is connected to a second water inlet pipe extending downward, and the other end is connected to a second water outlet pipe extending downward; The tower-type equal flow water distributor comprises a water supply main composed of a vertical upper thin tube and a lower thick tube, the upper thin tube and the lower thick tube are respectively connected to the inner sides of the upper and lower annular tubes through corresponding upper and lower horizontal connecting tubes, the outer sides of the upper and lower annular tubes are respectively connected to a plurality of corresponding upper water inlet branch pipes and a plurality of lower water inlet branch pipes arranged at intervals, the plurality of upper water inlet branch pipes are respectively connected to the corresponding first fan-shaped conductive copper tile water inlet pipes, the plurality of lower water inlet branch pipes are respectively connected to the corresponding second fan-shaped conductive copper tile water inlet pipes, and two top water inlet branch pipes are arranged on the top of the upper thin tube, the top water inlet branch pipes are connected to the central conductive copper tile water inlet pipe; The bottom end of the lower thick tube of the water supply main pipe is the water inlet end, the top end of the upper thin tube is the closed end, and the lower thick tube and the upper thin tube are connected through a tapered tube with a small top and a large bottom.

2. The water-cooled furnace bottom of the ore-fired furnace according to claim 1, characterized in that The water outlet pipe is connected to a cooler, or is connected to equipment that needs to use hot water.

3. The water-cooled furnace bottom of the ore-fired furnace according to claim 1, characterized in that The central conductive copper tile is configured as a circular conductive copper tile, the first conductive copper tile group is configured as four sector-shaped conductive copper tiles connected to each other, and the second conductive copper tile is configured as sixteen sector-shaped conductive copper tiles connected to each other.

4. The water-cooled furnace bottom of the ore-fired furnace according to claim 1, characterized in that The central conductive copper tile is provided with a central connection hole for connecting a thermocouple; the first fan-shaped conductive copper tile is provided with a first connection hole for connecting a thermocouple; and the second fan-shaped conductive copper tile is provided with a second connection hole for connecting a thermocouple.

5. The water-cooled furnace bottom of the ore-fired furnace according to claim 1, characterized in that The diameter of the central serpentine cooling channel is 42 mm; the diameter of the first serpentine cooling channel is 60 mm; and the diameter of the second serpentine cooling channel is 60 mm.

6. The water-cooled furnace bottom of the ore-fired furnace according to claim 1, characterized in that The diameters of the upper horizontal connecting pipe and the upper annular pipe are smaller than those of the lower horizontal connecting pipe and the lower annular pipe; the diameters of the upper and lower water inlet branch pipes are the same, and the number of elbows and the bending angle of each water inlet branch pipe are the same.

7. The water-cooled furnace bottom of the ore-fired furnace according to claim 1, characterized in that The upper and lower water inlet branches are provided with throttling orifice plates, which include two flanges arranged on the water inlet branch and an orifice plate with a plurality of through holes arranged between the two flanges, and the number, shape and size of the through holes of each throttling orifice plate are the same.

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